Good for occasional use, but a little heavy

First 3D glasses bought with my projector: very satisfied early.
After some time, we find them a bit heavy on the nose. They may also occasionally lose synchronization (if one turns away from the screen, or when the battery reaches its reservation). The glasses are all the same quality, good field of vision, no premature wear.

I now mainly use LCS glasses, lighter and with no sync loss (but longer to load, and requiring specific charger).